Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7debb7a3a6a943…

MALICIOUS

PDF

140.2 KB Created: 2021-10-10 17:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: be421a764c758f105996efd6d6e0c534 SHA-1: 986e571b0aa6e345fa197143258e1bf66b69edb3 SHA-256: de7debb7a3a6a943a6c32a15e20b58c3e4e49b1e78e2d66819fb6ecb2cff79bb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6564

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://falcon.dk/sites/default/files/webfm/kolixudexurusaripasik.pdf In PDF document text
    • http://sinice-rasy.cz/files/file/44988999523.pdfIn PDF document text
    • https://matagujrischool.com/admin/imagetemp1/file/jusukeseribolibevewoje.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/61598023970.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/pukedoxegikefakup.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/71825368025.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/lowidate.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wegitikifogon.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-23/images/files/geduta.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/98308418401.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/88679601133.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/1877194596.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/93942950427.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/fitidali.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615ee9f682b34---nexagudedesiwunitoso.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/wunebemejowidolupezoruxun.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/94294368948.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/beledaw.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/47297096764.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/64448651472.pdfIn PDF document text
    • https://812423.situshoki1.com/contents/files/jakoxiser.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/tumorisojagoxuj.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/28368348800.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/vetenotaxuvulasarusanis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=i+will+always+love+you+byPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20719 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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